It's All About The Tube, 'Bout The Tube, 'Bout The Tube I finally have my Marshall DSL15c dialed in. Stock, it sounded weak, the speaker sucked, the tone was off, the ultra-gain channel was only good for bone crunching metal, and the clean channel was anemic. I made a few resistor and capacitor changes, put an old Celestion G12H Anniversary speaker that I had laying around in it, put TAD 6v6 tubes in the power section, and tried a JJ 5751 in the V1 with Tungsol 12AX7 in the other two pre-amp slots and the phase inverter. After those changes, the ultra-gain channel was much better, but still had too much gain when I had the gain knob beyond 3. It was usable though. The problem was that the Clean channel was even weaker than before. So I searched and searched the internet and learned about the JJ ECC823 pre-amp tube. The ECC823 is 12ax7 style tube. One of the things about 12ax7 tubes is that they are actually two tubes in one (two separately functioning sides). With t
